I've been and have passes to the EL outlet, but TBH it's not that great. The store is really tiny! There ARE things that you may be able to find there, and often there are some pretty good deals on (especially if you can grab one of the goodie bags for $20 or $35 or whatever it was), but overall the range is fairly limited. They often have brush sets or eyeshadow palettes (e.g. novel twist, sweetie cakes, patternmaker (i think) ) but those are still fairly pricey. Then again, I don't have a staff pass. Mine is only a visitors pass, so I get less of a discount on items!
I haven't even bothered to go in about a year =\